updated 10/21/2010 AT 9:00 AM ET
•originally published 10/21/2010 AT 9:45 AM ET
By now, people should know it’s not a good idea to cross Taylor Swift.
On her new album, Speak Now, the singer, 20, not only calls out a “dark, twisted” game-playing ex-boyfriend (could it be John Mayer?) in “Dear John,” but the singer also gives a lyrical lashing to a harsh critic in “Mean.”
Swift tells PEOPLE the subject of her song is “a person who was repeatedly, constantly, perpetually ruining my day with the mean things that he was writing.”
She may be referring to music blogger Bob Lefsetz, who, to put it nicely, is not a fan of her singing and even wrote Tuesday that the song is probably about him.